From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C91321FAF17; Fri, 25 Oct 2024 11:42:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729856532; cv=none; b=cHQb21uPCV5YvYl0mv4O8YnnMTbG8dSPx/UwakKjezqj1ltKY5QcQcmZ+pRZnKrk8SQhbZClTLFnenu4Us7kw3d0XvcWb+EhuoURyYxQ1UW/57v2cwotUjvOwyOiEljFmOTEJVx+LRXjQD8Hhgi/AkvRPaAuJkGfNPgC7e38okw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729856532; c=relaxed/simple; bh=b9j1zTmawGmrojfup/LOAlSwgn3LIFUdXbsokDQU9HM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=MBtGGoAih5HAwbf3/dZy4Irga3YJ+EGUzz0jlpUAo1MqifwXUWjUFi/XCY+DF48hKfblMZh+jA5gD/bH/G4n5/batbiKwyJOs+9mhUtX3Ow871INVBZtQeCjtU+ktOi7fC0bJYpckqNTO80WZnc2AMRVuqu4VEae1X2atFCxASQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Sctp4mwF; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Sctp4mwF" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40131C4CEC3; Fri, 25 Oct 2024 11:42:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1729856532; bh=b9j1zTmawGmrojfup/LOAlSwgn3LIFUdXbsokDQU9HM=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Sctp4mwFa4+O8XrmsAVrFJHhkt2Auby18cDvGukLTGJOhHUrAFvja7DHRbKJ2YXLV Nfdo5Y3KNscyjyNFNhf1tQk82WvVBiMdqk1KVO2A26stzSpAGVPFn8Rvi/r+YkWzss Er7RYSK9/EsEeYh8L3Epkk8t435lqrMOHkXH1U8bSv7giqglHN+6YONOim9bh2uDCf JtxXUOYPpM/qMxle9U6WU6pUJ1lHOD7ryhWt1ADUHowHXUr348C3A5tlrJt2JXVVt2 Pky2OI6CdSBbhKRgCSUDA1ihJc/awsyEIQ1LCuMYd1pUWQ12N1BE5jHNQA7DL0Xjax UIGdxXKoy1eag== Message-ID: Date: Fri, 25 Oct 2024 13:42:04 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 1/2] dt-bindings: input: Add Nuvoton MA35D1 keypad To: Ming-Jen Chen Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-input@vger.kernel.org, linux-arm-kernel@lists.infradead.org, mjchen@nuvoton.com, peng.fan@nxp.com, sudeep.holla@arm.com, arnd@arndb.de, conor+dt@kernel.org, krzk+dt@kernel.org, robh@kernel.org, dmitry.torokhov@gmail.com References: <20241022063158.5910-1-mjchen0829@gmail.com> <20241022063158.5910-2-mjchen0829@gmail.com> <871e9a4c-7a3c-4a24-8829-a079983033da@gmail.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 25/10/2024 07:36, Ming-Jen Chen wrote: >> >>> + 0 = 0 clock >>> + 1 = 0 clock >>> + 2 = 0 clock >> Heh? So this is just 0 >> >>> + 3 = 8 clocks >> This is 8 >> >>> + 4 = 16 clocks >> 16, not 4 >> >>> + 5 = 32 clocks >>> + 6 = 64 clocks >>> + 7 = 128 clocks >>> + 8 = 256 clocks >>> + 9 = 512 clocks >>> + 10 = 1024 clocks >>> + 11 = 2048 clocks >>> + 12 = 4096 clocks >>> + 13 = 8192 clocks >> Use proper enum > I will update the definition to specify the debounce period in terms of > keypad IP clock cycles, as follow: > > nuvoton,debounce-period: >     type: integer >     enum: [0, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13] >     description: | >         Key debounce period select, specified in terms of keypad IP > clock cycles. >         This value corresponds to the register setting for the keypad > interface. >         The following values indicate the debounce time: >         - 0 = 0 clock cycles (no debounce) >         - 3 = 8 clock cycles >         - 4 = 16 clock cycles >         - 5 = 32 clock cycles >         - 6 = 64 clock cycles >         - 7 = 128 clock cycles >         - 8 = 256 clock cycles >         - 9 = 512 clock cycles >         - 10 = 1024 clock cycles >         - 11 = 2048 clock cycles >         - 12 = 4096 clock cycles >         - 13 = 8192 clock cycles No. 0, 8, 16, 32 , 64 etc. >> >> >>> + >>> + per-scale: >>> + $ref: /schemas/types.yaml#/definitions/uint32 >>> + description: Row Scan Cycle Pre-scale Value (1 to 256). >> Missing constraints >> >>> + >>> + per-scalediv: >>> + $ref: /schemas/types.yaml#/definitions/uint32 >>> + description: Per-scale divider (1 to 256). >> Missing constraints >> >> Both properties are unexpected... aren't you duplicating existing >> properties? > pre-scale: > This value configures the IC register for the row scan cycle > pre-scaling, with valid values ranging from 1 to 256 > per-scalediv:(I will change pre-scalediv to pre-scale-div) Please look for matching existing properties first. > This will describe its role in setting the divisor for the row scan > cycle pre-scaling, allowing for finer control over the keypad scanning > frequency > > I will change it to the following content: > nuvoton,pre-scale: >     type: uint32 >     description: | >         Row Scan Cycle Pre-scale Value, used to pre-scale the row scan > cycle. The valid range is from 1 to 256. >     minimum: 1 >     maximum: 256 > > nuvoton,pre-scale-div: >     type: uint32 >     description: | >         Divider for the pre-scale value, further adjusting the scan > frequency for the keypad. >     minimum: 1 >     maximum: 256 Best regards, Krzysztof